• Check whether Mflops numbers relate to a standard benchmark. Does this benchmark match your applications?
• Know the properties of the benchmarks whose results are advertised.
• Be sure you know all the relevant facts about your system and the manufacturer's benchmarking system. For hardware this includes clock frequency, memory latency, and cache size; for software it includes programming language, code size, data size, compiler version, compiler options, and runtime library.
• Check benchmark code listings to make sure apples are compared with apples and that no illegal optimizations are applied.
• Ask for a well-written performance report. Good companies provide all relevant details."